title: Gravity. It's not just a good idea. It's the law.
authors.forename: M
authors.initials: M
authors.lastname: Panigada
authors.forename: L
authors.initials: L
authors.lastname: Berra
mesh_terms: D058109:Airway Management / Q000295:instrumentation*; D006112:Gravitation; D006801:Humans; D053717:Pneumonia, Ventilator-Associated / Q000517:prevention & control; D011140:Polyurethanes; D011143:Polyvinyl Chloride; D011175:Positive-Pressure Respiration; D012121:Respiration, Artificial / Q000295:instrumentation*
chemical_list: D011140:Polyurethanes; D011143:Polyvinyl Chloride